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Bone mineral density (BMD), muscle strength, and balance are all important aspects of musculoskeletal health. The aim of the study was to describe associations between objectively‐measured physical activity and sedentary time and musculoskeletal health outcomes in middle‐aged women. The study is a cross-sectional analysis of data from a population-based sample of 309 women with an age range between 36 and 57 years. Results indicate that in middle‐aged women, greater total physical activity was associated with better musculoskeletal health. Moderate-to-vigorous physical activity appears more important than light physical activity or sedentary time for many musculoskeletal outcomes in middle‐aged women. Authors conclude that their findings are important for developing interventions to improve habitual physical activity that are targeted at improving musculoskeletal health amongst women in midlife when an accelerated process of decline in BMD, muscle strength, and balance begins.